[qftestJUI] can't catch ComponentNotFoundException in SUT script

Hi all,
in my SUT script i try to catch ComponentNotFoundException with the
following jython script:
try :
rc.getComponent("<component name>")
except ComponentNotFoundException :
rc.logError(" message")
each time i run this script, it failed and throw message that "component
could not be determined",
does anyone know why the script that i use don't catch it?
10x
Ido